[Milsurplus] Sonar Manual UQS-1 Date ?

[Hubert Miller]

In my stash i found a Sonar manual, UQS-1. The manual is NAVSHIPS 91757 and it looks like it had a higher than RESTRICTED rating
and looks typewritten throughout, altho it's quite large, about 2 inches thick. But - no date anywhere in it? When was this likely
to be produced?
Has anyone else noticed not many Sonar manuals around, or is it a mistaken impression of mine?

Which for some reason reminds me, when i lived in Seattle, i had some kind of harbor intrusion detection unit. It was a box
maybe 12 x 12 x 8 inches. I think it was the terminal end of some kind of magnetic or electric intrusion line. I gave it away -
hope something like this was saved somewhere, at least one.
-Hue
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